<?php

namespace WxJDK;

class JSSDK

{
    //公众号appid ，公众号开发配置处可查看
    public    $appId;
//公众号appi ， 公众号开发配置处可查看
    private $appSecret;
    private $url;
    /**
     * @name        初始化参数
     * @copyright    zydbbt 2018-10-27
     */

    public function __construct($appId ,$appSecret ,$url){
        $this    -> appId            = $appId;
        $this    -> appSecret        = $appSecret;
        $this->url=$url;

    }

    public function getAcc(){
        return $this -> getAccessToken();

    }


    public function getWxConfig(){

        # - 获取 jsapi_ticket
        $jsapiTicket = $this -> getJsApiTicket();

# - 获取调用页面的url
        $protocol = (!empty($_SERVER['HTTPS'])&& $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443)? "https://" : "http://";
        //$url = "mercarplus.qingmengcar.com/mindex";//"$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
        $url=$this->url;

# - 时间戳
        $timestamp = time();

# - 获取随机字符串
        $nonceStr = $this -> createNonceStr();

# - 这里参数的顺序要按照 key 值 ASCII 码升序排序
# - 亦可把参数以数组存值，ksort() - 以升序对关联数组进行排序
        $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

# - sha1获取签名
        $signature = sha1($string);

# - 页面所需注入参数
        $WxConfig = array(
            "appId"    => $this -> appId,
            "nonceStr"  => $nonceStr,
            "timestamp" => $timestamp,
            "url"      => $this->url,
            "signature" => $signature,
            "rawString" => $string
        );

# - 返回

        return $WxConfig;

    }

    private function getJsApiTicket(){

        # - 判断缓存
        $ticket = session('ticket');
        if(!$ticket){
            # - 获取
            $accessToken = $this->getAccessToken();

# - 获取Ticket
# - 如果是企业号用以下 URL 获取 ticket
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";

# - get请求，转换数组
            $result = json_decode($this->httpGet($url),true);
            $ticket = $result['ticket'];

# - 全局缓存
            if ($ticket){
                # - 官方返回

# - {
# -        "errcode":0,
# -        "errmsg":"ok",
# -        "ticket":"bxLdikRXVbTPdHSM05e5u5sUoXNKd8-41ZO3MhKoyN5OfkWITDGgnr2fwJ0m9E8NYzWKVZvdVtaUgWvsdshFKA",
# -    "expires_in":7200
# - }
//                session('ticket',$ticket,$result['expires_in']);
                session('ticket',$ticket);
            }
        }
        # - 返回
        return $ticket;
    }

    private function getAccessToken(){

        # - 判断缓存
        $access_token = session('accesToken');
        if(!$access_token){
            # - 如果是企业号用以下URL获取access_token
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
# - get请求，转换数组
            $result = json_decode($this->httpGet($url),true);
            $access_token = $result['access_token'];
# - 全局缓存
            if ($access_token){
//                session('accesToken',$result['access_token'],$result['expires_in']);
                session('accesToken',$result['access_token']);
            }
        }
        # - 返回
        return $access_token;
    }

    private function httpGet($url){
        # - 初始化
        $curl = curl_init();
# - 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。
# - 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
        curl_setopt($curl,CURLOPT_URL,$url);
        curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false);
        curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,false);
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);
        curl_setopt($curl,CURLOPT_TIMEOUT,500);
# - 请求
        $res = curl_exec($curl);
//        $res = json_decode($res, true);
# - 关闭
        curl_close($curl);
# - 返回
        return $res;
    }

    private function httpPost($url,$query_data){

        # - 初始化
        $curl = curl_init();

# - 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。
# - 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
        curl_setopt($curl,CURLOPT_URL,$url);
        curl_setopt($curl,CURLOPT_POSTFIELDS,$query_data);
        curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false);
        curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,false);
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);
        curl_setopt($curl,CURLOPT_TIMEOUT,500);

# - 请求
        $res = curl_exec($curl);
//        $res = json_decode($res, true);
# - 关闭
        curl_close($curl);
# - 返回
        return $res;
    }


    private function createNonceStr($length = 16){

        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0;$i < $length;$i++){
            $str .= substr($chars,mt_rand(0,strlen($chars)- 1),1);
        }
        return $str;
    }

    public function getCommodityInfo($sub){

//聚合数据接口
# - 如果是企业号用以下URL获取access_token
        $url = "http://feedback.api.juhe.cn/ISBN?key=c74a5cde7c1e58709624454f18447a54&sub=".$sub;
# - get请求，转换数组
        $result = json_decode($this->httpGet($url),true);
        halt($result);
    }
}
